#include <iostream>

using namespace std;
int main(int argc, char *argv[]) {
	int number = 3;
	int * pnum = &number;
	cout << *pnum <<endl;
	 * pnum = 20;
	int * pnum2 =  pnum;
	cout << *pnum <<endl;
	number *=2;
	cout << * pnum2;
}